Statistical data set: Average speed, delay and reliability of travel times (CGN)

Average speed, delay and reliability of travel times on SRN (CGN04)

CGN0404: Average speed on the Strategic Road Network in England: monthly and annual averages (ODS, 387 KB)

CGN0405: Average delay on the Strategic Road Network in England: monthly and annual averages (ODS, 378 KB)

Average speed and delay on local ‘A’ roads (CGN05)

CGN0503: Average speed on local ‘A’ roads in England: monthly and annual averages (ODS, 162 KB)

CGN0504: Average delay on local ‘A’ roads in England: monthly and annual averages (ODS, 164 KB)

Contact us Road congestion and travel times

Email congestion.stats@dft.gov.uk

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Published 19 July 2018 Last updated 7 March 2024 + show all updates 7 March 2024 Data tables have been updated to include data up to December 2023. Over 2023 the congestion statistics processing was transferred to a new software enabling greater precision and accuracy in calculations and imputation of the production of statistical values. This has led to minor revisions for the whole Local 'A' CGN05 time series. A historical methodological error when transferring processing to a new software at the sub-national geography level affected the SRN data. This accounts for the minor revisions in the CGN04 tables b-e.

13 December 2023 The latest data for October 2023 through September 2023 have been added to the data tables.

27 September 2023 Data tables updated for the latest release.

14 June 2023 Data tables have been updated to include data up to March 2023.

9 March 2023 The tables have been updated to include data from January 2019 to December 2022

14 December 2022 Data tables updated for the travel time measures for SRN and local 'A' roads for October 2021 to September 2022.

8 September 2022 The tables have been updated to include data up to June 2022.

29 June 2022 Data tables updated for the travel time measures for SRN and local 'A' roads for April 2021 to March 2022.

2 March 2022 Data tables updated for the 2021 travel time measures report.

14 December 2021 New data tables created to reflect changes to the data provider.

8 July 2021 Data tables updated for April 2020 to March 2021 travel time measures report.

25 February 2021 Data tables updated for the 2020 travel time measures report.

3 December 2020 Data tables updated for year ending September 2020 statistics release.

16 September 2020 Data tables updated for year ending June 2020 statistics report.

18 June 2020 Data tables updated for year ending March 2020 statistics release.

5 March 2020 All data tables updated for the 2019 travel time measures report.

19 September 2019 Updated tables for 'Travel time measures for the Strategic Road Network and local ‘A’ roads: July 2018 to June 2019'.